Is there a hard tail in the Coma Cluster X-ray spectrum?

2003/12/17 by M. Rossetti, Mariachiara Rossetti, S. Molendi +1 · 11 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #Astrophysics and Cosmic Phenomena #astro-ph

paper · pdf · doi:10.1051/0004-6361:20031749

published as Astron.Astrophys. 414 (2004) L41 · 4 pages, 2 figures, to appear in A&A Letters

arxiv created 2003/12/17 · openalex publication_date 2004/01/27 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/31

Abstract

We report results from a re-analysis of the BeppoSAX observation of Coma and from the analysis of a second, yet unpublished observation of the same object. From our re-analysis of the first observation we find that the statistical evidence for a hard tail is about 2σ. From the analysis of the second observation which, thanks to the lower background and the longer exposure time, is characterized by a larger signal-to-noise we find no evidence for a hard tail. From the upper limit on the flux of the hard tail, using the standard Inverse Compton formulae, we derive a lower limit for the magnetic of consistent with Faraday rotation measurements.

Citations

• RXTEandASCAConstraints on Nonthermal Emission from the A2256 Galaxy Cluster

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